Home Topics Access What is the difference between access verification rules and verification text?

What is the difference between access verification rules and verification text?

Apr 10, 2024 pm 02:02 PM
access sql statement

Validation rules are used to create business rules to validate field values, while validation text is used to provide input guidance to users. Validation rules perform automatic validation through expressions or functions, limit the user input range, and display custom error messages; validation text provides prompts or instructions as input reference, does not limit the input value, and displays a default error message.

What is the difference between access verification rules and verification text?

The difference between Access verification rules and verification text

Access verification rules and verification text are used in Microsoft Access Two functions that validate user input. There are some key differences in their functionality and role:

Validation Rules

  • are used to create a set of business rules for field values.
  • Ensure that the entered data meets specific conditions or formats.
  • Automatically perform validation when the user enters data.
  • Can be written using expressions, functions or SQL statements.
  • Validation rules limit the range of values ​​that users can enter.
  • If the validation rule fails, a custom error message will be displayed.

Validation text

  • is used to provide information to the user on how to enter data.
  • Tips or instructions that appear next to the field.
  • Provide guidance before the user enters data.
  • can be used as a reference regarding data formats, data ranges, or other input restrictions.
  • Validation text does not limit the values ​​the user can enter.
  • If the user enters invalid data, the Access default error message will be displayed.

Example

For example, if you want to validate the email address field, you can use the following validation rule:

<code>IsValidEmailAddress([字段名称])</code>

This will ensure that the entered The value conforms to the format of an email address.

As verification text, you can enter the following:

<code>请使用以下格式输入电子邮件地址:name@example.com</code>

This will provide the user with instructions on how to enter their email address.

Purpose

Typically, validation rules are used to enforce data integrity and ensure that entered data meets business requirements. Validation text is used to guide the user and provide information about input expectations.

The above is the detailed content of What is the difference between access verification rules and verification text?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undress AI Tool

Undress AI Tool

Undress images for free

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

PHP Tutorial
1502
276
10 latest tools for web developers 10 latest tools for web developers May 07, 2025 pm 04:48 PM

Web development design is a promising career field. However, this industry also faces many challenges. As more businesses and brands turn to the online marketplace, web developers have the opportunity to demonstrate their skills and succeed in their careers. However, as demand for web development continues to grow, the number of developers is also increasing, resulting in increasingly fierce competition. But it’s exciting that if you have the talent and will, you can always find new ways to create unique designs and ideas. As a web developer, you may need to keep looking for new tools and resources. These new tools and resources not only make your job more convenient, but also improve the quality of your work, thus helping you win more business and customers. The trends of web development are constantly changing.

How to understand DMA operations in C? How to understand DMA operations in C? Apr 28, 2025 pm 10:09 PM

DMA in C refers to DirectMemoryAccess, a direct memory access technology, allowing hardware devices to directly transmit data to memory without CPU intervention. 1) DMA operation is highly dependent on hardware devices and drivers, and the implementation method varies from system to system. 2) Direct access to memory may bring security risks, and the correctness and security of the code must be ensured. 3) DMA can improve performance, but improper use may lead to degradation of system performance. Through practice and learning, we can master the skills of using DMA and maximize its effectiveness in scenarios such as high-speed data transmission and real-time signal processing.

How to add your WordPress site in Yandex Webmaster Tools How to add your WordPress site in Yandex Webmaster Tools May 12, 2025 pm 09:06 PM

Do you want to connect your website to Yandex Webmaster Tools? Webmaster tools such as Google Search Console, Bing and Yandex can help you optimize your website, monitor traffic, manage robots.txt, check for website errors, and more. In this article, we will share how to add your WordPress website to the Yandex Webmaster Tool to monitor your search engine traffic. What is Yandex? Yandex is a popular search engine based in Russia, similar to Google and Bing. You can excel in Yandex

How to fix HTTP image upload errors in WordPress (simple) How to fix HTTP image upload errors in WordPress (simple) May 12, 2025 pm 09:03 PM

Do you need to fix HTTP image upload errors in WordPress? This error can be particularly frustrating when you create content in WordPress. This usually happens when you upload images or other files to your CMS using the built-in WordPress media library. In this article, we will show you how to easily fix HTTP image upload errors in WordPress. What is the reason for HTTP errors during WordPress media uploading? When you try to upload files to Wo using WordPress media uploader

Steps to add and delete fields to MySQL tables Steps to add and delete fields to MySQL tables Apr 29, 2025 pm 04:15 PM

In MySQL, add fields using ALTERTABLEtable_nameADDCOLUMNnew_columnVARCHAR(255)AFTERexisting_column, delete fields using ALTERTABLEtable_nameDROPCOLUMNcolumn_to_drop. When adding fields, you need to specify a location to optimize query performance and data structure; before deleting fields, you need to confirm that the operation is irreversible; modifying table structure using online DDL, backup data, test environment, and low-load time periods is performance optimization and best practice.

How to develop a complete Python Web application? How to develop a complete Python Web application? May 23, 2025 pm 10:39 PM

To develop a complete Python Web application, follow these steps: 1. Choose the appropriate framework, such as Django or Flask. 2. Integrate databases and use ORMs such as SQLAlchemy. 3. Design the front-end and use Vue or React. 4. Perform the test, use pytest or unittest. 5. Deploy applications, use Docker and platforms such as Heroku or AWS. Through these steps, powerful and efficient web applications can be built.

What is mysql used for? Explain the main application scenarios of mysql database in detail What is mysql used for? Explain the main application scenarios of mysql database in detail May 24, 2025 am 06:21 AM

MySQL is an open source relational database management system, mainly used to store, organize and retrieve data. Its main application scenarios include: 1. Web applications, such as blog systems, CMS and e-commerce platforms; 2. Data analysis and report generation; 3. Enterprise-level applications, such as CRM and ERP systems; 4. Embedded systems and Internet of Things devices.

What are the plugins for wordpress blocking ip What are the plugins for wordpress blocking ip Apr 20, 2025 am 08:27 AM

WordPress IP blocking plugin selection is crucial. The following types can be considered: based on .htaccess: efficient, but complex operation; database operation: flexible, but low efficiency; firewall: high security performance, but complex configuration; self-written: highest control, but requires more technical level.

See all articles